Las Matemáticas — Mathematics

[irmamar]

Originally Posted by laepelba

In English, we can say "x squared" OR "x to the second power" and "x cubed" OR "x to the third power". Both are equally acceptable, and I teach both.

With the roots, I would only ever say "square root", but could easily exchange "third root" for "cube root".

English is a strange language..........

Yes, I've made a search and you can say "x a la segunda o a la tercera". That's correct, but it's more common "al cuadrado y al cubo" (it's been a long time I don't study maths)

[Perikles]

Originally Posted by irmamar

(it's been a long time I don't study maths)

it's been long time since I studied maths.

[irmamar]

Originally Posted by Perikles

it's been long time since I studied maths.

I can say, in Spanish:

Hace mucho tiempo que no estudio matemáticas
Ha pasado mucho tiempo desde que estudiaba matemáticas.

But thanks again

[Perikles]

I have not studied maths for a long time
It has been a long time since I studied maths
A long time has passed since ...

no se puede utilizar since con negativa

[irmamar]

Originally Posted by Perikles

I have not studied maths for a long time
It has been a long time since I studied maths
A long time has passed since ...

no se puede utilizar since con negativa

OK, I didn't know. Thanks

[Perikles]

Originally Posted by irmamar

OK, I didn't know. Thanks

Aqui las normas en Inlgés son complicadas.

Help!! pjt33????

[pjt33]

I haven't studied maths since secondary school.
I haven't studied maths since I was at secondary school.
Since he failed to get that job he's been moping about the house.
Since he didn't get that job he's been moping about the house. Feels fairly informal to me. I'd avoid this construction myself because "since" has the alternative meaning of "because" and here I have a sense that I'm trying to understand it in that sense, failing, and falling back on the sense of "in the period of time from then to now".

Entonces no sé cuál es la regla que Perikles invoca, pero tampoco sé por qué lo ha mencionado, puesto que (¡since!) la frase de Irma no contenía la palabra "since".


Hace mucho tiempo que + verbo perfecto = Verbo perfecto + for a long time.
E.g. Hace mucho tiempo que soy profesor = I've been a teacher for a long time.
Hace mucho tiempo que no estudio las mates = I haven't studied maths for a long time.

[Rusty]

In the U.S., we always use math instead of maths.
It's been a long time since I studied math.
I hate math.
Who is your math teacher?
When do you have math?

[Perikles]

Originally Posted by irmamar

it's been a long time I don't study maths

Originally Posted by Perikles

it's been long time since I studied maths.

Originally Posted by pjt33

Entonces no sé cuál es la regla que Perikles invoca, pero tampoco sé por qué lo ha mencionado, puesto que (¡since!) la frase de Irma no contenía la palabra "since"..

That's why I asked for help, I don't know the formal rule here. I just wanted to say that you can't say it's been a long time since + (a negative), such as it's been a long time since I don't study maths

[hermit]

Saying "Ever since he didn't get that job..." avoids confusion
re: since/because.

hermit

[pjt33]

Originally Posted by Perikles

That's why I asked for help, I don't know the formal rule here. I just wanted to say that you can't say it's been a long time since + (a negative), such as it's been a long time since I don't study maths

"It's been a long time since" is already a negative construction, so it's probably just a special case of the general prohibition against double negatives. Shrug.

Hermit, good point.

[brute]

How about doing binary (base2) arithmetic in Spanish, using just the digits 0 and 1?

Also in logic we can use the symbols 0 and 1 to represent two mutually opposite states such as on and off, or true and false? In this system the symbols . and + are used to mean AND and OR

[Cloudgazer]

integral de superficie = surface integral
integral de línea = line integral
integral múltiple = multiple integral
integración = integration

coordenadas polares = polar coordinates
coordenadas esféricas = spherical coordinates
coordenadas cilíndricas = cylindrical coordinates

diferenciable = differentiable
diferenciabilidad = differentiability
diferenciación = differentiation

continuidad = continuity
continuo = continuous

función derivable = differentiable function (in 1 dimension)
función diferenciable = differentiable function (in multiple dimensions)
función continua = continuous function
derivada parcial = partial derivative

conjunto = set
subconjunto = subset
intervalo = interval

dimensión = dimension
dominio = domain
rango = range

polinomio = polynomial

[laepelba]

Why didn't this thread show when I looked under Forums/Vocabulary/Vocabulary by topic? I had to do a search on forum titles.... ???

Anyway - it occurred to me this morning (while teaching about fractions to a group of Spanish speaking students) that I don't know how fractions are worded in Spanish.

one-half two-halves
one-third two-thirds
one-fourth two-fourths three-fourths
one-fifth two-fifths three-fifths
one-sixth
one-seventh
one-eighth
one-ninth
one-tenth

etc....

Thanks!

[chileno]

Originally Posted by laepelba

Why didn't this thread show when I looked under Forums/Vocabulary/Vocabulary by topic? I had to do a search on forum titles.... ???

Anyway - it occurred to me this morning (while teaching about fractions to a group of Spanish speaking students) that I don't know how fractions are worded in Spanish.

one-half two-halves - medio/media -dos medios
one-third two-thirds - un tercio - dos tercios
one-fourth two-fourths three-fourths - un cuarto - dos cuartos-tres cuartos
one-fifth two-fifths three-fifths - un quinto- dos quintos - tres quintos
one-sixth - un sexto- dos sextos
one-seventh - un séptimo - dos séptimos
one-eighth - un octavo - dos octavos
one-ninth - un noveno- dos novenos
one-tenth - un décimo - dos décimos

etc.... - etc.

Thanks!

[laepelba]

Thanks, Hernan! Now, when you say "etc.", I'm not sure how to generically determine the "n-th" denominator. In English, we add "-th" if it's a unique number name (seventeenth, twentieth, etc.), and if it ends with "one" through "nine", the ending is the same as that number (twenty-third, fifty-ninth, etc.) How would I determine, say, how to say "eight elevenths" or "fifteen twenty-thirds", etc.?

[Ambarina]

onceavos = elevenths
doceavos = twelfths
treceavos = thirteenths...
veinteavos = twentieths

dos quinceavos = two fifteenths
trece dieciochavos = thirteen eighteenths

I think that's how it goes, in answer to your question Lou Ann.

[laepelba]

VERY helpful! Thanks!!

[chileno]

Originally Posted by laepelba

VERY helpful! Thanks!!

Yes, thank you Ambarina.

However, I wanted to go to the "undécimo" form, and I could not remember what is it that they are called...

Ok, Lou Ann, you are a Math teacher...

Numbers: Cardinals, ordinals is there any other?

[laepelba]

Originally Posted by chileno

Yes, thank you Ambarina.

However, I wanted to go to the "undécimo" form, and I could not remember what is it that they are called...

Ok, Lou Ann, you are a Math teacher...

Numbers: Cardinals, ordinals is there any other?

What's "undécimo" form?

I think that most people would just say that there are cardinal and ordinal numbers. I've read somewhere about "nominal" numbers (numbers that name something like a number on a sports jersey or something like that), but I don't know how conventional that is. In a mathematics class, we talk about real numbers, rational and irrational numbers, integers, whole numbers and natural or counting numbers. Those are probably not practical or "every-day" numbers that anyone but a math teacher would use.....